Wind screen



A, KNr-:cHT

oct. `26, 1937.

WINDA SCREEN Filed April 19, 19:57

2 Sheets-Sheef 1 A. KNECHT WIND SCREEN Filed April 19, 1957 oct. 26, 1937..

2 Sheets-Sheet 2 Patented Oct. 26, 1937 PATENT. OFFICE f WIND SCREEN Albert Knecht, Wilen, Switzerland Application ,April 19, '1937, SerialrNo. 137,867 In Germany April 6, 1936 4 Claims.

'Ihe invention relates tov windscreens and more particularly to windscreens of motor-vehicles with closed bodies.

One object of the invention is the provision of means to hold the wind screens dry and to prevent the condensation of moisture on the windsoreens and a further object is the provision of means to keepat least one of the side panels dry and free from condensed moisture.

In my Patent 2,030,258 I attain these `objects by the use of two panes of glass or the like said panes being arranged at a certain distance one behind the other and a preheated air flow passing between these two panes.

According to the present invention I substitute the second pane by a pair of bordering pieces, of L-shaped cross section extending along the upper and lower edge respectively ofthe windscreen pane and letting free a part of the surface of the windshield between said bordering pieces. For the detailed description of my invention reference may be had to the following specication and the accompanying drawings forming a part thereof, wherein:

Fig. 1 is a View of a wind screen with the bordering pieces seen from the interior of the vehicle.

Fig. 2 is a vertical middle section of Fig. 1 completed'by the air introducing tube.

Fig. 3 is a partial section on the line A-B of Fig. 2.

Fig. 4 is a plan View to Fig. 3.

Fig. 5 is a section as Fig. 3 of a modified form of the lower bordering piece.

Fig. 6 is a View seen from the interior of the vehicle of a further modification, the upper and lower bordering pieces being joined to a bordering frame having substantially the shape of a horizontal U.

Fig. 7 is a cross section of Fig. 6.

In Figs. 1-5 of the drawings I indicates the air introducing tube arranged beneath the windshield 4 and provided preferably at its end with a regulating device 2, 3 for the purpose to let, if desired, warm air into the interior of the vehicle. A branch 5 (or as shown in Fig. 5, two branches) is arranged for the connection with a atted mouth piece 6 the shape of which is shown in Figs. 2 and 3 and which may be provided in a known manner with curved guiding walls 1, side slots 6 and further openings 9 and I0 from which the warm air escapes. This mouth piece is completed, according to my invention, by a lower bordering piece Il and an upper one I2 of substantially L shaped cross section, The lower piece I I may be made, as shown in the drawings, of one piece with the mouth piece B or it may be made as a separate piece connected in a suitable manner to said mouth piece. The upper bordering piece I2 may instead of being fastened to the frame of the windscreen, as shown, be made with thisframe of one piece.I In Fig. '7 two mouth pieces I3 are provided from which the air escapes in opposite directions, a space remaining between the two mouth pieces. Preferably a middle separating wall I4 is provided in Figs. l, 2 and 3 and may also be provided at the place of the dotted middle line shown in Fig. 5. Also on the upper bordering piece I2 a similar separating wall or angle piece I5 may be provided. The arrangement of such middle separating means has the advantage to secure an equal distribution of the air from the middle to both sides of the windscreen.

In the modified form of Figs. 6 and 'I I6 indicates the framing of the windscreen 2|. The lower and upper bordering pieces of the hereinbefore described modification are joined at one side (the right one in Fig. 6) by an upright connecting part to a bordering frame I'I of substantially L shaped cross section such bordering frame showing the Shape of horizontal U open at one side (the left one in Fig. 6). The frame I1 is fixed in any suitable known manner f. i, by means of suction pieces provided with screw nuts` 22 on the wind screen pane 2I. The warmed air is admitted by means of a pipe I 8 and a curved tube or bend I9 through an opening 20 against the windshield or windscreen pane 2| at the lower corner of the bordering frame I'I as shown in Figs. 6 and '7. A curved guiding wall 21 may be provided to cover the upper dead corner. The lower and upper bordering legs of the frame I1 may extend to nearly midway of the wind screen surface or may be lengthened. They may be lengthened equally or differently as shown by dotted lines in Fig. 6.. The lower and upper bor.- dering pieces of Figs. 1-5 or the U shaped bordering frame' of Figs. 6 and 7 may be or may not be made of transparent material. In all cases the lower and the upper bordering pieces of substantially L shaped cross section prevent the air blown in from escaping from the space between pane and bordering piece downward or upward respectively and force the air to pass as a flat layer along the inner surface of the windscreen pane holding the pane surface between said bordering pieces dry and free from condensed moisture. In the modication of Figs. 1-5 also the adjacent side panels are touched by said air layer and in 'the modification of rigs. 6 and '7 also one of the side panels (the left one), atleast if the upper and lower leg of the bordering Vframe YI1, are lengthened as shown in dotted lines in Fig. 6.

I One advantage over the double pane device of my earlier patent referred to isthe possibility of a more easy and convenient cleaninglof the inner surface of the windshield proper or windopen at itsrupper side,V such open portions form- Y ing with the windshield air passages alongthe Y top andrbottom of said windshield,a'nd means forintroducing warmed air throughout thespace between Ythe windshield and the lowerrbordering piece. -Y- v Y f Y 2. A wind screen for motor vehicles; comprising a windshield proper, a lower land an upper bordering piece of substantially L-shape in cross section arranged inwardly from Vthe windshield properythe upper bordering piece being open at the bottom and the lower bordering piece being open at Yits upper side, such open portions form- Aing with theY windshieldk air passagesr'alongthe top and bottom of said windshield, the lower and upper bordering pieces beingjoined at one side 2,096,901 Y n Y or by an upright part to'a substantially lil-shapedA bordering frame,k and means for introducing warmed air throughout the space between the windshield and the lower bordering piece. Y

3; A wind screen for motor vehicles, compris/- ing a Vwindshield proper, a lower and an upper Ybordering piece of substantially an. VVL-shaped cross section'arranged inwardly from the Wind: shield proper and extending over more than half the Width of the windshield; the upper bordering piece being open at the bottom and the lower A jbordering piece `Ibeing open at its upper side, such open portions forming Withrthe windshield Aairpassages along theftop and :bottom `of said windshield,` and means forY introducing warmed air throughout the space between the Windshield and the lower bordering piece.

4. A Wind screen'for motor vehicles, Ying Va windshield proper, an L-shaped bordering Y piece at the upper edge of the windshield, one member of the bordering piece extending downwardly and spaced from VKthe windshield; a de`` ilector arranged in the space-intermediatethe length-thereof, a second L-shaped bordering piece at therlower edge of the windshield,V one Vmember of the bordering piece at the lower edge of the windshield extending upwardly and spaced compris- Y Y' from the windshield, and means for introducing warmed air to theV space atwthe lower edge of the windshield.

ALBERT Kmzcrrr.A 

